Re: [chatroom benchmark version 1.0.1] Results

From: Paolo Ciarrocchi (
Date: Fri Sep 20 2002 - 02:51:30 EST

From: "Martin J. Bligh" <>
> Any chance of doing two runs on exactly the same kernel, one with
> preempt on, and the other with preempt off? That's a much nicer
> hint ;-)

Here is the result from 2.5.33

2.5.33-no_preemption.results:Average throughput :59695 messages per second

2.5.33.results:Average throughput : 59522 messages per second

No benefit from preemption.

Anyway, I'll back tomorrow with the results from 2.5.36 (with and withou preemption) running the test
10 times and evaluating the average.
I'm gonna using this script:
> `uname -r`_total.results
for i in `seq 1 1 10`
        ./chat_c 30 1000 9999 >>`uname -r`_total.results
grep Average `uname -r`_total.results |cut -d " " -f 4| awk '{tot+=$1}; END {print "Average throughput: " tot/NR " messages per second"}'

If you have any suggestion, just let me know.


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